Results 21 to 30 of about 9,578 (225)

Evolution of Alfven wave-driven solar winds to red giants [PDF]

, 2007
In this talk we introduce our recent results of global 1D MHD simulations for the acceleration of solar and stellar winds. We impose transverse photospheric motions corresponding to the granulations, which generate outgoing Alfven waves. The Alfven waves
Axford, Banerjee, Heyvaerts, Holweger, Kojima, Landini, Renzini, Suzuki, Takeru K. Suzuki, Tsurutani   +9 more
core   +1 more source

Self-similar evolution of Alfven wave turbulence [PDF]

Journal of Physics A: Mathematical and Theoretical, 2017
Summary: We study self-similar solutions of the kinetic equation for MHD wave turbulence derived in [\textit{S. Galtier} et al., ``A weak turbulence theory for incompressible magnetohydrodynamics'', J. Plasma Phys. 63, No. 5, 447--488 (2000; \url{doi:10.1017/s0022377899008284})].
N K Bell, V N Grebenev, S B Medvedev, S V Nazarenko   +3 more
openaire   +1 more source

Coupling Between Alfvén Wave and Kelvin–Helmholtz Waves in the Low Latitude Boundary Layer

Frontiers in Astronomy and Space Sciences, 2022
The Kelvin–Helmholtz (KH) instability of magnetohydrodynamic surface waves at the low latitude boundary layer is examined using both an eigenfrequency analysis and a time-dependent wave simulation.
E.-H. Kim, J. R. Johnson, K. Nykyri
doaj   +1 more source

Alfven wave cyclotron resonance heating [PDF]

, 1981
The resonance absorption of fast Alfven waves at the proton ctclotron resonance of a predominately deuterium plasma is investigated. An approximate dispersion relation is derived, valid in the vicinity of the resonance, which permits an exact calculation of transmission and reflection coefficients.
White, R. B., Yosikawa, S., Oberman, C.
openaire   +2 more sources

Ion acceleration by parallel propagating nonlinear Alfvén wave packets in a radially expanding plasma [PDF]

Nonlinear Processes in Geophysics, 2014
The numerical simulation of the nonlinear evolution of the parallel propagating Alfvén waves in a radially expanding plasma is performed by using a kinetic-fluid model (the Vlasov–MHD model). In our study, both the nonlinear evolution of the Alfvén waves
Y. Nariyuki, T. Umeda, T. K. Suzuki, T. Hada   +3 more
doaj   +1 more source

Numerical simulations of conversion to Alfven waves in sunspots

, 2011
We study the conversion of fast magneto-acoustic waves to Alfven waves by means of 2.5D numerical simulations in a sunspot-like magnetic configuration. A fast, essentially acoustic, wave of a given frequency and wave number is generated below the surface
Avrett, Bellot Rubio, Cally, Cally, Cally, Cavallini, Centeno, Centeno, Centeno, Collados, Cranmer, E. Khomenko, Felipe, Felipe, Felipe, Fujimura, Hansen, Jefferies, Khomenko, Khomenko, Khomenko, Khomenko, Khomenko, Khomenko, Khomenko, Manso Sainz, Mihalas, Norton, P. S. Cally, Parchevsky, Priest, Socas-Navarro, Socas-Navarro, Trujillo Bueno, Van Doorsselaere, Zhugzhda, Štěpán   +36 more
core   +1 more source

Experimental Generation of Plasma Alfven Waves

Physical Review Letters, 1959
Alfven has postulated the existence of hydromagnetic waves to explain certain sunspot phenomena. An experiment is described in which an effort was made to generate and detect such waves. (A.C.)
Allen, T.K., Baker, William R., Pyle, Robert V., Wilcox, John M.   +3 more
openaire   +2 more sources

Ion‐Scale Kinetic Alfvén Turbulence: MMS Measurements of the Alfvén Ratio in the Magnetosheath

Geophysical Research Letters, 2018
Turbulence in the Earth's magnetosheath at ion kinetic scales is investigated with the magnetospheric multiscale spacecraft. Several possibilities in the wave paradigm have been invoked to explain plasma turbulence at ion kinetic scales such as kinetic ...
O. W. Roberts, S. Toledo‐Redondo, D. Perrone, J. Zhao, Y. Narita, D. Gershman, R. Nakamura, B. Lavraud, C. P. Escoubet, B. Giles, J. Dorelli, C. Pollock, J. Burch   +12 more
doaj   +1 more source

Analysis of Magnetic Fields in Inertial Alfven Wave Collisions

, 2014
Turbulence in astrophysical and space plasmas is dominated by the nonlinear interaction of counterpropagating Alfven waves. Most Alfven wave turbulence theories have been based on ideal plasma models, such as incompressible MHD, for Alfven waves at large
Carter, Troy A., Dorfman, Seth, Drake, Dereth J., Howes, Gregory G., Kletzing, Craig A., Schroeder, James W. R., Shanken, Brian C., Skiff, Frederick   +7 more
core   +1 more source

Dynamics of broadband dispersive Alfven waves

, 2006
The properties of amplitude modulated broadband Alfven waves is investigated. In particular, the dynamics of circularly polarized dispersive Alfven waves, governed by a derivative nonlinear Schroedinger equation, is analyzed using the Wigner formalism ...
Hada, Kaup, Klimontovich, Lashkin, Loudon, M. Marklund, Medvedev, Medvedev, Mio, Mjølhus, Moyal, P.K. Shukla, Rogister, Ruderman, Sakai, Spangler, Wigner   +16 more
core   +1 more source